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avcodec/mlpdec: add max channels check

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Fixes: out of array access
Fixes: 51648/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TRUEHD_fuzzer-4644322217164800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2022-09-30 00:44:31 +02:00
parent 77164b2344
commit f1f78e3cf4
1 changed files with 3 additions and 0 deletions
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3
libavcodec/mlpdec.c
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@@ -547,6 +547,9 @@ static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
return AVERROR_PATCHWELCOME; return AVERROR_PATCHWELCOME;
} }
if (max_channel + 1 > MAX_CHANNELS || max_channel + 1 < min_channel)
return AVERROR_INVALIDDATA;
s->min_channel = min_channel; s->min_channel = min_channel;
s->max_channel = max_channel; s->max_channel = max_channel;
s->coded_channels = ((1LL << (max_channel - min_channel + 1)) - 1) << min_channel; s->coded_channels = ((1LL << (max_channel - min_channel + 1)) - 1) << min_channel;